I tried kubuntu but it felt a bit wonky with some broken stuff, etc KDE neon i never tried but looking into it heard it doesn't have a lot of users behind it and it's mostly a bleeding edge testing ground.

My best experience so far has been manjaro KDE. The defaults seem fine and work. Pacman is so nice. The AUR, snaps, flatpaks, appimages... Tick some checkboxes and they're all there. I don't feel troubled trying to find software anymore. My GTK and QT apps look fairly consistent by picking matching themes for both.

I love it so far.